How do neon testers work
How does a neon tester work?
I've seen the other answer on the internet.
Many people say that the glow of neon light on the tester is due to a stray capacitor formed by our body and floor. I'm fine with this until I found out the tester works on DC too. Since I am confused there, I think the capacitor is not working but the tester is glowing in both poles. Please help me understand here. If it is due to a stray capacitor, then how does it work in DC?
TYPICAL "NEON TESTER":
The tested voltage is contacted with the knife tip.
The finger is placed on the metal cap.
Circuit is Voltage_in - tip_resistor - neon - YOU.
Neon lights when voltage is present.
An excellent question.
High-voltage direct current works when there is sufficient earth fault from person to earth.
If the resistance to ground is around 1 megaohm, it should operate on direct current above the neon stop voltage.
At 10 megaohms it can work.
At over 10M it is uncertain.
Did you see it work with DC itself?
Which voltage DC? What environment - bare feet? Rubber shoes ...?
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